* Fix the logclosing bug.

* Make ICMP logging more verbose.

* Allow to use different syslog levels.

* Detect attacks.

* Detect traceroute queries.

* Detect nmap null scans.

* Log outgoing packets.

* Write support for ICMPv6.

* Rewrite the program using libpcap. This has been started (see version
  1.99.x).
